- Dona Paula, Goa, India.
- +91-0832- 2450327
- iiosc2020[at]nio[dot]org
Abstract Submission No. | ABS-2022-13-0195 |
Title of Abstract | A Seismotectonic Analysis of Earthquake Swarm in Andaman and Nicobar Islands Region, India (1960 to 2020) |
Authors | SNEHASHIS ALAM *, M Vijaya Sunanda , Dr Mohan Kumar Bera |
Organisation | Birla Institute of Technology and Science Pilani, Goa Campus |
Address | BITS-PILANI K K Birla Goa Campus Goa, Goa, India Pincode: 403726 Mobile: 9734055194 E-mail: snehashisalam@gmail.com |
Country | India |
Presentation | Oral |
Abstract | The Andaman arc-Sea region is the highly tectonically and seismically active region in India. This is the perfect location for studying earthquake swarms and how the swarms are reciting with the volcanic activities and tectonic processes. We documented 17 earthquake swarms from 1960 to 2020 from the ISC & USGS NEIC catalogue and plotted via GeoMapApp. The focus of the earthquake swarms are located between 5 km. to 50 km. depth. We examined the sources mechanisms and seismotectonic characteristics of these swarms. The Moment Tensor Solutions of these swarms showing these events are controlled by pure normal faults also controlled by normal faulting with a significant strike-slip component, few are dominated by strike-slip faults but no thrust mechanisms are recorded. The b value of this region significantly high, above 1. The investigation and supporting evidences expose that the earthquake swarms in the Andaman & Nicobar Island region are generated by hydrothermal activities beneath the oceanic crust or magma intrusion in the thin and hot oceanic crust. High b values, active volcanoes, cratered seamount supports the volcanic background of these swarms. |